Related Clues:

• Well-gotten gain?
• Shell food?
• Slippery substance
• Prudhoe Bay find
• Folded fare
• Slick starter
• Contents of some barrels
• Change it regularly
• Slick stuff
• With 'of' and 51-Across, a facial moisturizer
• Tex-Mex order
• Bell or shell preceder
• Natural resource
• Drilling goal
• It can be hydrogenated